:root{
  --bg:#0f172a;
  --bg-soft:#111827;
  --card:#1e293b;
  --border:#2d3b52;
  --text:#e5e7eb;
  --text-dim:#94a3b8;
  --accent:#6366f1;
  --accent-hover:#4f46e5;
  --danger:#ef4444;
  --sidebar-w:240px;
}

*{box-sizing:border-box;margin:0;padding:0}

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
}

/* ---------- Login page ---------- */
.login-wrap{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
  background:
    radial-gradient(circle at 20% 20%, rgba(99,102,241,.18), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(99,102,241,.12), transparent 40%),
    var(--bg);
}

.login-card{
  width:100%;
  max-width:380px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  padding:36px 32px;
  box-shadow:0 20px 50px rgba(0,0,0,.35);
}

.login-logo{
  width:44px;height:44px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--accent),#a855f7);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:18px;color:#fff;
  margin-bottom:20px;
}

.login-card h1{
  font-size:22px;
  margin-bottom:6px;
}

.login-card p.sub{
  color:var(--text-dim);
  font-size:14px;
  margin-bottom:28px;
}

.field{
  margin-bottom:16px;
}

.field label{
  display:block;
  font-size:13px;
  color:var(--text-dim);
  margin-bottom:6px;
}

.field input{
  width:100%;
  padding:11px 12px;
  border-radius:8px;
  border:1px solid var(--border);
  background:var(--bg-soft);
  color:var(--text);
  font-size:14px;
  outline:none;
  transition:border-color .15s;
}

.field input:focus{
  border-color:var(--accent);
}

.login-options{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin:4px 0 22px;
  font-size:13px;
  color:var(--text-dim);
}

.login-options label{
  display:flex;
  align-items:center;
  gap:6px;
  cursor:pointer;
}

.btn{
  width:100%;
  padding:12px;
  border:none;
  border-radius:8px;
  background:var(--accent);
  color:#fff;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:background .15s;
}

.btn:hover{background:var(--accent-hover)}

.error-msg{
  display:none;
  background:rgba(239,68,68,.12);
  border:1px solid rgba(239,68,68,.35);
  color:#fca5a5;
  font-size:13px;
  padding:10px 12px;
  border-radius:8px;
  margin-bottom:16px;
}

.hint{
  margin-top:20px;
  text-align:center;
  font-size:12px;
  color:var(--text-dim);
}

/* ---------- Dashboard layout ---------- */
.app{
  display:flex;
  min-height:100vh;
}

.sidebar{
  width:var(--sidebar-w);
  background:var(--bg-soft);
  border-right:1px solid var(--border);
  display:flex;
  flex-direction:column;
  padding:20px 14px;
  flex-shrink:0;
}

.sidebar-brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:6px 8px 24px;
}

.sidebar-brand .logo{
  width:32px;height:32px;
  border-radius:8px;
  background:linear-gradient(135deg,var(--accent),#a855f7);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:14px;color:#fff;
}

.sidebar-brand span{
  font-weight:600;
  font-size:15px;
}

.nav-group-label{
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:.05em;
  color:var(--text-dim);
  padding:14px 10px 6px;
}

.nav-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 10px;
  border-radius:8px;
  color:var(--text-dim);
  text-decoration:none;
  font-size:14px;
  margin-bottom:2px;
  cursor:pointer;
  border:none;
  background:none;
  width:100%;
  text-align:left;
}

.nav-link:hover{
  background:rgba(255,255,255,.05);
  color:var(--text);
}

.nav-link.active{
  background:rgba(99,102,241,.15);
  color:#c7d2fe;
}

.nav-link .icon{
  width:18px;height:18px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}

.sidebar-footer{
  margin-top:auto;
  border-top:1px solid var(--border);
  padding-top:14px;
}

.user-chip{
  display:flex;
  align-items:center;
  gap:10px;
  padding:8px 10px;
  border-radius:8px;
}

.user-chip .avatar{
  width:30px;height:30px;
  border-radius:50%;
  background:#334155;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:600;
}

.user-chip .name{font-size:13px;font-weight:600}
.user-chip .email{font-size:11px;color:var(--text-dim)}

.logout-btn{
  margin-top:8px;
  width:100%;
  background:none;
  border:1px solid var(--border);
  color:var(--text-dim);
  padding:8px 10px;
  border-radius:8px;
  font-size:13px;
  cursor:pointer;
}
.logout-btn:hover{
  color:var(--danger);
  border-color:rgba(239,68,68,.4);
}

.main{
  flex:1;
  min-width:0;
  padding:28px 34px;
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:26px;
}

.topbar h1{
  font-size:22px;
}

.topbar .sub{
  color:var(--text-dim);
  font-size:13px;
  margin-top:4px;
}

.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:16px;
  margin-bottom:28px;
}

.stat-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:12px;
  padding:18px 20px;
}

.stat-card .label{
  font-size:12px;
  color:var(--text-dim);
  margin-bottom:8px;
}

.stat-card .value{
  font-size:26px;
  font-weight:700;
}

.stat-card .delta{
  font-size:12px;
  margin-top:6px;
}
.delta.up{color:#4ade80}
.delta.down{color:#f87171}

.panel{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:12px;
  padding:20px 22px;
}

.panel h2{
  font-size:15px;
  margin-bottom:14px;
}

.panel-empty{
  color:var(--text-dim);
  font-size:13px;
  padding:30px 0;
  text-align:center;
}

@media (max-width:760px){
  .sidebar{
    position:fixed;
    inset:0 auto 0 0;
    z-index:20;
    transform:translateX(-100%);
    transition:transform .2s;
  }
  .sidebar.open{transform:translateX(0)}
  .main{padding:20px}
  .menu-toggle{display:inline-flex !important}
}

.menu-toggle{
  display:none;
  background:none;
  border:1px solid var(--border);
  color:var(--text);
  border-radius:8px;
  width:36px;height:36px;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}